<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<style>
    body {
        padding: 10px;
    }

    .btn {
        display: block;
        padding: 10px;
        background: blueviolet;
        width: 150px;
    }
</style>

<body>
    <div>
        <div class="btn">打开配置界面</div>
    </div>
    <script src="./popup.js"></script>
</body>

</html>